HackMD lets you create realtime collaborative markdown notes on all platforms. Inspired by Hackpad, with more focus on speed and flexibility. Still in the early stage, feel free to fork or contribute to HackMD.
Thanks for using! 😄
Chrome >= 47, Chrome for Android >= 47
Safari >= 9, iOS Safari >= 8.4
Firefox >= 44
IE >= 9, Edge >= 12
Opera >= 34, Opera Mini not supported
- Android Browser >= 4.4
- Node.js 6.x or up (test up to 7.5.0)
- Database (PostgreSQL, MySQL, MariaDB, SQLite, MSSQL) use charset
utf8 - npm (and its dependencies, especially uWebSockets, node-gyp)
- For building HackMD we recommend to use a machine with at least 2GB RAM
- Download a release and unzip or clone into a directory
- Enter the directory and type
bin/setup, which will install npm dependencies and create configs. The setup script is written in Bash, you would need bash as a prerequisite. - Setup the configs, see more below
- Setup environment variables which will overwrite the configs
- Build front-end bundle by
npm run build(usenpm run devif you are in development) - Run the server as you like (node, forever, pm2)
You can quickly setup a sample Heroku HackMD application by clicking the button below.
If you deploy it without the button, keep in mind to use the right buildpacks. For details check app.json.
Debian-based version:
Alpine-based version:
The easiest way to setup HackMD using docker are using the following three commands:
git clone https://github.com/hackmdio/docker-hackmd.git
cd docker-hackmd
docker-compose upRead more about it in the docker repository…
If you are upgrading HackMD from an older version, follow these steps:
- Fully stop your old server first (important)
git pullor do whatever that updates the filesnpm installto update dependencies- Build front-end bundle by
npm run build(usenpm run devif you are in development) - Modify the file named
.sequelizerc, change the value of the variableurlwith your db connection string For example:postgres://username:password@localhost:5432/hackmd - Run
node_modules/.bin/sequelize db:migrate, this step will migrate your db to the latest schema - Start your whole new server!
- migrate-to-1.1.0
We deprecated the older lower case config style and moved on to camel case style. Please have a look at the current config.json.example and check the warnings on startup.
Notice: This is not a breaking change right now but in the future
We don't use LZString to compress socket.io data and DB data after version 0.5.0. Please run the migration tool if you're upgrading from the old version.
We've dropped MongoDB after version 0.4.0. So here is the migration tool for you to transfer the old DB data to the new DB. This tool is also used for official service.
There are some config settings you need to change in the files below.
./config.json ----application settings
| variables | example values | description |
|---|---|---|
NODE_ENV |
production or development |
set current environment (will apply corresponding settings in the config.json) |
DEBUG |
true or false |
set debug mode; show more logs |
HMD_DOMAIN |
hackmd.io |
domain name |
HMD_URL_PATH |
hackmd |
sub URL path, like www.example.com/<URL_PATH> |
HMD_PORT |
80 |
web app port |
HMD_ALLOW_ORIGIN |
localhost, hackmd.io |
domain name whitelist (use comma to separate) |
HMD_PROTOCOL_USESSL |
true or false |
set to use SSL protocol for resources path (only applied when domain is set) |
HMD_URL_ADDPORT |
true or false |
set to add port on callback URL (ports 80 or 443 won't be applied) (only applied when domain is set) |
HMD_USECDN |
true or false |
set to use CDN resources or not (default is true) |
HMD_ALLOW_ANONYMOUS |
true or false |
set to allow anonymous usage (default is true) |
HMD_ALLOW_ANONYMOUS_EDITS |
true or false |
if allowAnonymous is true, allow users to select freely permission, allowing guests to edit existing notes (default is false) |
HMD_ALLOW_FREEURL |
true or false |
set to allow new note creation by accessing a nonexistent note URL |
HMD_DEFAULT_PERMISSION |
freely, editable, limited, locked or private |
set notes default permission (only applied on signed users) |
HMD_DB_URL |
mysql://localhost:3306/database |
set the database URL |
HMD_SESSION_SECRET |
no example | Secret used to sign the session cookie. If non is set, one will randomly generated on startup |
HMD_SESSION_LIFE |
1209600000 |
Session life time. (milliseconds) |
HMD_FACEBOOK_CLIENTID |
no example | Facebook API client id |
HMD_FACEBOOK_CLIENTSECRET |
no example | Facebook API client secret |
HMD_TWITTER_CONSUMERKEY |
no example | Twitter API consumer key |
HMD_TWITTER_CONSUMERSECRET |
no example | Twitter API consumer secret |
HMD_GITHUB_CLIENTID |
no example | GitHub API client id |
HMD_GITHUB_CLIENTSECRET |
no example | GitHub API client secret |
HMD_GITLAB_SCOPE |
read_user or api |
GitLab API requested scope (default is api) (GitLab snippet import/export need api scope) |
HMD_GITLAB_BASEURL |
no example | GitLab authentication endpoint, set to use other endpoint than GitLab.com (optional) |
HMD_GITLAB_CLIENTID |
no example | GitLab API client id |
HMD_GITLAB_CLIENTSECRET |
no example | GitLab API client secret |
HMD_MATTERMOST_BASEURL |
no example | Mattermost authentication endpoint |
HMD_MATTERMOST_CLIENTID |
no example | Mattermost API client id |
HMD_MATTERMOST_CLIENTSECRET |
no example | Mattermost API client secret |
HMD_DROPBOX_CLIENTID |
no example | Dropbox API client id |
HMD_DROPBOX_CLIENTSECRET |
no example | Dropbox API client secret |
HMD_GOOGLE_CLIENTID |
no example | Google API client id |
HMD_GOOGLE_CLIENTSECRET |
no example | Google API client secret |
HMD_LDAP_URL |
ldap://example.com |
URL of LDAP server |
HMD_LDAP_BINDDN |
no example | bindDn for LDAP access |
HMD_LDAP_BINDCREDENTIALS |
no example | bindCredentials for LDAP access |
HMD_LDAP_SEARCHBASE |
o=users,dc=example,dc=com |
LDAP directory to begin search from |
HMD_LDAP_SEARCHFILTER |
(uid={{username}}) |
LDAP filter to search with |
HMD_LDAP_SEARCHATTRIBUTES |
displayName, mail |
LDAP attributes to search with (use comma to separate) |
HMD_LDAP_USERIDFIELD |
uidNumber or uid or sAMAccountName |
The LDAP field which is used uniquely identify a user on HackMD |
HMD_LDAP_USERNAMEFIELD |
Fallback to userid | The LDAP field which is used as the username on HackMD |
HMD_LDAP_TLS_CA |
server-cert.pem, root.pem |
Root CA for LDAP TLS in PEM format (use comma to separate) |
HMD_LDAP_PROVIDERNAME |
My institution |
Optional name to be displayed at login form indicating the LDAP provider |
HMD_SAML_IDPSSOURL |
https://idp.example.com/sso |
authentication endpoint of IdP. for details, see guide. |
HMD_SAML_IDPCERT |
/path/to/cert.pem |
certificate file path of IdP in PEM format |
HMD_SAML_ISSUER |
no example | identity of the service provider (optional, default: serverurl)" |
HMD_SAML_IDENTIFIERFORMAT |
no example | name identifier format (optional, default: urn:oasis:names:tc:SAML:1.1:nameid-format:emailAddress) |
HMD_SAML_GROUPATTRIBUTE |
memberOf |
attribute name for group list (optional) |
HMD_SAML_REQUIREDGROUPS |
Hackmd-users |
group names that allowed (use vertical bar to separate) (optional) |
HMD_SAML_EXTERNALGROUPS |
Temporary-staff |
group names that not allowed (use vertical bar to separate) (optional) |
HMD_SAML_ATTRIBUTE_ID |
sAMAccountName |
attribute map for id (optional, default: NameID of SAML response) |
HMD_SAML_ATTRIBUTE_USERNAME |
mailNickname |
attribute map for username (optional, default: NameID of SAML response) |
HMD_SAML_ATTRIBUTE_EMAIL |
mail |
attribute map for email (optional, default: NameID of SAML response if HMD_SAML_IDENTIFIERFORMAT is default) |
HMD_IMGUR_CLIENTID |
no example | Imgur API client id |
HMD_EMAIL |
true or false |
set to allow email signin |
HMD_ALLOW_PDF_EXPORT |
true or false |
Enable or disable PDF exports |
HMD_ALLOW_EMAIL_REGISTER |
true or false |
set to allow email register (only applied when email is set, default is true. Note bin/manage_users might help you if registration is false.) |
HMD_IMAGE_UPLOAD_TYPE |
imgur, s3, minio or filesystem |
Where to upload image. For S3, see our Image Upload Guides for S3 or Minio |
HMD_S3_ACCESS_KEY_ID |
no example | AWS access key id |
HMD_S3_SECRET_ACCESS_KEY |
no example | AWS secret key |
HMD_S3_REGION |
ap-northeast-1 |
AWS S3 region |
HMD_S3_BUCKET |
no example | AWS S3 bucket name |
HMD_MINIO_ACCESS_KEY |
no example | Minio access key |
HMD_MINIO_SECRET_KEY |
no example | Minio secret key |
HMD_MINIO_ENDPOINT |
minio.example.org |
Address of your Minio endpoint/instance |
HMD_MINIO_PORT |
9000 |
Port that is used for your Minio instance |
HMD_MINIO_SECURE |
true |
If set to true HTTPS is used for Minio |
HMD_AZURE_CONNECTION_STRING |
no example | Azure Blob Storage connection string |
HMD_AZURE_CONTAINER |
no example | Azure Blob Storage container name (automatically created if non existent) |
HMD_HSTS_ENABLE |
true |
set to enable HSTS if HTTPS is also enabled (default is true) |
HMD_HSTS_INCLUDE_SUBDOMAINS |
true |
set to include subdomains in HSTS (default is true) |
HMD_HSTS_MAX_AGE |
31536000 |
max duration in seconds to tell clients to keep HSTS status (default is a year) |
HMD_HSTS_PRELOAD |
true |
whether to allow preloading of the site's HSTS status (e.g. into browsers) |
HMD_CSP_ENABLE |
true |
whether to enable Content Security Policy (directives cannot be configured with environment variables) |
HMD_CSP_REPORTURI |
https://<someid>.report-uri.com/r/d/csp/enforce |
Allows to add a URL for CSP reports in case of violations |
| variables | example values | description |
|---|---|---|
debug |
true or false |
set debug mode, show more logs |
domain |
localhost |
domain name |
urlPath |
hackmd |
sub URL path, like www.example.com/<urlpath> |
port |
80 |
web app port |
allowOrigin |
['localhost'] |
domain name whitelist |
useSSL |
true or false |
set to use SSL server (if true, will auto turn on protocolUseSSL) |
hsts |
{"enable": true, "maxAgeSeconds": 31536000, "includeSubdomains": true, "preload": true} |
HSTS options to use with HTTPS (default is the example value, max age is a year) |
csp |
{"enable": true, "directives": {"scriptSrc": "trustworthy-scripts.example.com"}, "upgradeInsecureRequests": "auto", "addDefaults": true} |
Configures Content Security Policy. Directives are passed to Helmet - see their documentation for more information on the format. Some defaults are added to the configured values so that the application doesn't break. To disable this behaviour, set addDefaults to false. Further, if usecdn is on, some CDN locations are allowed too. By default (auto), insecure (HTTP) requests are upgraded to HTTPS via CSP if useSSL is on. To change this behaviour, set upgradeInsecureRequests to either true or false. |
protocolUseSSL |
true or false |
set to use SSL protocol for resources path (only applied when domain is set) |
urlAddPort |
true or false |
set to add port on callback URL (ports 80 or 443 won't be applied) (only applied when domain is set) |
useCDN |
true or false |
set to use CDN resources or not (default is true) |
allowAnonymous |
true or false |
set to allow anonymous usage (default is true) |
allowAnonymousEdits |
true or false |
if allowAnonymous is true: allow users to select freely permission, allowing guests to edit existing notes (default is false) |
allowFreeURL |
true or false |
set to allow new note creation by accessing a nonexistent note URL |
defaultPermission |
freely, editable, limited, locked, protected or private |
set notes default permission (only applied on signed users) |
dbURL |
mysql://localhost:3306/database |
set the db URL; if set, then db config (below) won't be applied |
db |
{ "dialect": "sqlite", "storage": "./db.hackmd.sqlite" } |
set the db configs, see more here |
sslKeyPath |
./cert/client.key |
SSL key path (only need when you set useSSL) |
sslCertPath |
./cert/hackmd_io.crt |
SSL cert path (only need when you set useSSL) |
sslCAPath |
['./cert/COMODORSAAddTrustCA.crt'] |
SSL ca chain (only need when you set useSSL) |
dhParamPath |
./cert/dhparam.pem |
SSL dhparam path (only need when you set useSSL) |
tmpPath |
./tmp/ |
temp directory path |
defaultNotePath |
./public/default.md |
default note file path |
docsPath |
./public/docs |
docs directory path |
indexPath |
./public/views/index.ejs |
index template file path |
hackmdPath |
./public/views/hackmd.ejs |
hackmd template file path |
errorPath |
./public/views/error.ejs |
error template file path |
prettyPath |
./public/views/pretty.ejs |
pretty template file path |
slidePath |
./public/views/slide.hbs |
slide template file path |
sessionName |
connect.sid |
cookie session name |
sessionSecret |
secret |
cookie session secret |
sessionLife |
14 * 24 * 60 * 60 * 1000 |
cookie session life |
staticCacheTime |
1 * 24 * 60 * 60 * 1000 |
static file cache time |
heartbeatInterval |
5000 |
socket.io heartbeat interval |
heartbeatTimeout |
10000 |
socket.io heartbeat timeout |
documentMaxLength |
100000 |
note max length |
email |
true or false |
set to allow email signin |
allowEmailRegister |
true or false |
set to allow email register (only applied when email is set, default is true. Note bin/manage_users might help you if registration is false.) |
imageUploadType |
imgur(default), s3, minio, azure or filesystem |
Where to upload image |
minio |
{ "accessKey": "YOUR_MINIO_ACCESS_KEY", "secretKey": "YOUR_MINIO_SECRET_KEY", "endpoint": "YOUR_MINIO_HOST", port: 9000, secure: true } |
When imageUploadType is set to minio, you need to set this key. Also checkout our Minio Image Upload Guide |
s3 |
{ "accessKeyId": "YOUR_S3_ACCESS_KEY_ID", "secretAccessKey": "YOUR_S3_ACCESS_KEY", "region": "YOUR_S3_REGION" } |
When imageuploadtype be set to s3, you would also need to setup this key, check our S3 Image Upload Guide |
s3bucket |
YOUR_S3_BUCKET_NAME |
bucket name when imageUploadType is set to s3 or minio |
| service | settings location | description |
|---|---|---|
| facebook, twitter, github, gitlab, mattermost, dropbox, google, ldap, saml | environment variables or config.json |
for signin |
| imgur, s3, minio, azure | environment variables or config.json |
for image upload |
dropbox(dropbox/appKey) |
config.json |
for export and import |
| service | callback URL (after the server URL) |
|---|---|
/auth/facebook/callback |
|
/auth/twitter/callback |
|
| github | /auth/github/callback |
| gitlab | /auth/gitlab/callback |
| mattermost | /auth/mattermost/callback |
| dropbox | /auth/dropbox/callback |
/auth/google/callback |
|
| saml | /auth/saml/callback |
hackmd/
├── tmp/ --- temporary files
├── docs/ --- document files
├── lib/ --- server libraries
└── public/ --- client files
├── css/ --- css styles
├── js/ --- js scripts
├── vendor/ --- vendor includes
└── views/ --- view templates
From 0.3.2, we started supporting operational transformation. It makes concurrent editing safe and will not break up other users' operations. Additionally, now can show other clients' selections. See more at http://operational-transformation.github.io/
License under AGPL.